1) A qualitative assessment of a road's operating conditions. For local government comprehensive planning purposes, level of service means an indicator of the extent or degree of service provided by, or proposed to be provided by, a facility based on and related to the operational characteristics of the facility. Level of service indicates the capacity per unit of demand for each public facility. 2) This term refers to a standard measurement used by transportation officials which reflects the relative ease of traffic flow on a scale of A to F, with free-flow being rated LOS-A and congested conditions rated as LOS-F.

Long Range Transportation Plan (LRTP)

A document resulting from regional or statewide collaboration and consensus on a region or state's transportation system, and serving as the defining vision for the region's or state's transportation systems and services. In metropolitan areas, the plan indicates all of the transportation improvements scheduled for funding over the next 20 years.

Limited Maintenance Plan

A maintenance plan that EPA has determined meets EPA's limited maintenance plan policy criteria for a given NAAQS and pollutant. To qualify for a limited maintenance plan, for example, an area must have a design value that is significantly below a given NAAQS, and it must be reasonable to expect that a NAAQS violation will not result from any level of future motor vehicle emissions growth.

Land Use Plan

A plan which establishes strategies for the use of land to meet identified community needs.

Local Street

A street intended solely for access to adjacent properties.

Light Rail

A streetcar-type vehicle operated on city streets, semi-exclusive rights-of-way, or exclusive rights-of-way. Service may be provided by step-entry vehicles or by level boarding.

Light-Duty Vehicle

A vehicle category that combines light automobiles and trucks.

Large Regionals (Air)

Air carrier groups with annual operating revenues between $20 million and $99,999,999.

Logistics

All activities involved in the management of product movement; delivering the right product from the right origin to the right destination, with the right quality and quantity, at the right schedule and price.

Limitation on Obligations

Any action or inaction by an officer or employee of the United States that limits the amount of Federal assistance that may be obligated during a specified time period. A limitation on obligations does not affect the scheduled apportionment or allocation of funds, it just controls the rate at which these funds may be used.

Long Term

In transportation planning, refers to a time span of, generally, 20 years. The transportation plan for metropolitan areas and for States should include projections for land use, population, and employment for the 20-year period.

Liquefied Natural Gas (LNG)

Natural gas, primarily methane, that has been liquefied by reducing its temperature to -260 °F at atmospheric pressure.

Railroad vehicle equipped with flanged wheels for use on railroad tracks, powered directly by electricity, steam, or fossil fuel, and used to move other railroad rolling equipment.

Land Use

Refers to the manner in which portions of land or the structures on them are used, i.e. commercial, residential, retail, industrial, etc.

Local Technical Assistance Program Center

These Centers are responsible for providing transportation assistance to State and local governments that includes, but is not limited to, circuit rider programs, providing training on intergovernmental transportation planning and project selection, and tourism recreation travel.